100% Pass Salesforce - Plat-Dev-301 - Salesforce Certified Platform Developer II - Multiple Choice–Valid Exam Lab Questions

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Salesforce Plat-Dev-301 Exam Syllabus Topics:

SectionObjectives
Topic 1: Integration and APIs- External system integration
  • 1. Callouts from Apex
    • 2. REST and SOAP API usage
      - Platform events and messaging
      • 1. Change Data Capture concepts
        • 2. Event-driven architecture
          Topic 2: Application Development- Asynchronous processing
          • 1. Scheduled Apex
            • 2. Future methods and limits considerations
              • 3. Batch Apex and Queueable Apex
                - Advanced Apex programming
                • 1. Apex design patterns and best practices
                  • 2. Dynamic Apex and metadata-driven development
                    • 3. Exception handling and debugging strategies
                      Topic 3: Data Modeling and Management- Data access and security
                      • 1. Sharing rules and Apex-managed sharing
                        • 2. Security enforcement in Apex
                          - Advanced data modeling
                          • 1. Large data volume considerations
                            • 2. Complex relationships and schema design
                              Topic 4: Testing and Deployment- Deployment lifecycle
                              • 1. Version control and CI/CD concepts
                                • 2. Change sets and deployment tools
                                  - Testing strategies
                                  • 1. Code coverage and quality practices
                                    • 2. Test data creation and mocking

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                                      Salesforce Certified Platform Developer II - Multiple Choice Sample Questions (Q34-Q39):

                                      NEW QUESTION # 34
                                      A developer created an Apex class that updates an Account based on input from a Lightning web component that Is used to register an Account. The update to the Account should only be made if it has not already been registered.

                                      What should the developer do to ensure that users do not overwrite each other's updates to the same Account if they make updates at the same time? A)

                                      B)

                                      C)

                                      D)

                                      Answer: D

                                      Explanation:
                                      When multiple users are updating the same record at the same time, there is a risk of overwriting each other's changes. Salesforce provides a mechanism called 'record locking' to prevent this from happening.
                                      Option D is correct because including FOR UPDATE in the SOQL query locks the retrieved records for the duration of the transaction. This prevents other transactions from updating the record until the current transaction is complete, which is essential for avoiding race conditions where two users might overwrite each other's updates.
                                      Option A is incorrect because while adding a try/catch block around the update operation is good practice for handling exceptions, it does not prevent overwrites from concurrent updates.
                                      Option B is incorrect because using upsert instead of update does not address the problem of concurrent updates. The upsert operation is used to either insert a new record or update an existing one based on whether a record with a matching ID or external ID already exists.
                                      Option C is incorrect because FOR UPDATE should be used in the SOQL query to lock the records, not in the SELECT statement itself.
                                      Salesforce Developer Documentation on Locking Statements: Locking Statements Salesforce Developer Blog on Handling Concurrency in Apex: Handling Concurrency in Apex


                                      NEW QUESTION # 35
                                      The use of the transient keyword in Visualforce page controllers helps with which common performance issue?

                                      Answer: C

                                      Explanation:
                                      The transient keyword in Visualforce page controllers marks variables that should not be part of the view state, which can significantly reduce the size of the view state. This can help avoid view state limit errors and improve page performance because a smaller view state requires less time to send to the client.


                                      NEW QUESTION # 36
                                      When developing a Lightning web component, which setting displays lightninglayout-items im one column on small devices, such as mobile phones, and in two columns on tablet-size and desktop-size screens?

                                      Answer: C

                                      Explanation:
                                      To display lightning-layout-items in one column on small devices and in two columns on larger devices, you should set the size attribute to "12" for small devices and the medium-device-size attribute to "6". This ensures that on small devices each item takes the full width, and on medium or larger devices, items take up half the width.


                                      NEW QUESTION # 37
                                      What should a developer use to query all Account fields for the Acme account in their sandbox?

                                      Answer: D

                                      Explanation:
                                      The correct SOQL query to retrieve all fields for a specific Account is to use the FIELDS(ALL) function within the SELECT clause of the SOQL query. This will return all fields for the Account named 'Acme'.


                                      NEW QUESTION # 38
                                      A company has a custom object, Order__c, that has a custom picklist field, Status__c, with values of `"New', `"In Progress', or `"Fulfilled' and a lookup field, Contact__c, to Contact.
                                      Which SOQL query will return a unique list of all the Contact records that have no `"Fulfilled' Orders?

                                      Answer: C

                                      Explanation:
                                      The correct SOQL query to return a unique list of Contact records that have no 'Fulfilled' Orders is one that selects Ids from the Contact object where the Contact Id is not in the set of Contact Ids related to 'Fulfilled' Orders. This is done by a subquery that selects the Contact__c field from the Order__c records where the Status__c is 'Fulfilled'.


                                      NEW QUESTION # 39
                                      ......

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